Song intros that really grab you? ?

I am hoping to inject new life into this great thread. I'm compiling 1-2 minutes cuts of the beginning of songs to play between innings of my son's high school baseball games. Please, keep 'em coming.

Also Sprach Zarathustra (Theme from 2001: A Space Odyssey) from the Deodato 'Prelude' album.

-Beethoven: Sym #5 (the whole first movement),
-Beethoven: Fur Elise
-Arthur Pryor: "Blue Blues of Scotland" (I love that trombone intro, I've played it countless times on my horn)
-Nine Inch Nails: "Head Like a Hole"
-Metallica: "Enter Sandman" (This was a milestone for me. This was the first pop/rock song that I actually liked. Before that, I primarily listened to classical music exclusively. There was just something about this song that drew me into it. I think it was the less agressive guitar intro that made it paletable)
-Gorefest: "From Ignorance to Oblivion" (the intro in this just explodes). I first heard this as an mp3 called 'gorefest.mp3' on the college campus network back in '97. I just had to find out what band/song/album that was. Man I loved that intro.
-Cannibal Corpse: "Hammer Smashed Face"
-???: "Sweet Home Chicago"
-Simon and Garfunkel: "Mrs. Robinson"
-Guess Who: "American Woman"
-the music of Gloria Estefan, although I can't think of a specific song at the moment.

Panufnik: "Sinfonia Sacra"
The Who: "Pinball Wizard"
XTC: "River of Orchids"
Guns 'N Roses: "Sweet Child 'O Mine"
The Band: "Up on Cripple Creek"
Robbie Robertson: "Fallen Angel"
Freedy Johnston: "Bad Reputation"
Luna: "How Long Can This Go On?"
Husker Du: "These Important Years"
Kings X: "Everybody Knows a Little Bit"

"You Really Got Me" The Kinks
"Can't You Hear Me Knocking" The Rolling Stones